The incorrect statement regarding 'X' in the | vedclass

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(D) The reaction is $2BF_3 + 6LiAlH_4 \xrightarrow{	ext{Ether}} B_2H_6 + 6LiF + 6AlH_3$. Here,$(X)$ is $B_2H_6$ (diborane).In $B_2H_6$,there are $12$

Vedclass · Accepted Answer

$X$ does not react with $NH_3$.

Vedclass · Answer

(D) The reaction is $2BF_3 + 6LiAlH_4 \xrightarrow{	ext{Ether}} B_2H_6 + 6LiF + 6AlH_3$. Here,$(X)$ is $B_2H_6$ (diborane).In $B_2H_6$,there are $12$ valence electrons involved in bonding ($6$ from $2B$ and $6$ from $6H$).It contains $4$ terminal $B-H$ bonds,which are $2$-centre-$2$-electron $(2c-2e)$ bonds.It contains $2$ bridging $B-H-B$ bonds,which are $3$-centre-$2$-electron $(3c-2e)$ bonds.$B_2H_6$ reacts with $NH_3$ to form different products depending on conditions,such as $B_2H_6 \cdot 2NH_3$ (at low temperature) or $B_3N_3H_6$ (inorganic benzene) at high temperature. Thus,the statement that $X$ does not react with $NH_3$ is incorrect.

The incorrect statement regarding '$X$' in the given reaction is $BF_3 + LiAlH_4 \xrightarrow{\text{Ether}} (X) + LiF + AlF_3$.

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